Hi, I am trying to follow along with the 20 newsgroups example but using my own data. I am running the examples on a server with 24GB of RAM and 24 cores. When I get to the "Computing TF-IDF" stage, the whole process fails with the following exception. I have 14000 documents and 2 classes. The lexicon consists of 2705284 trigrams which I created myself. I then set the ng parameter equal to 1 since I already tokenized the words myself.
The system at max has only been using 4-5GB total, and I have set MAHOUT_OPTIONS=-Xmx4g, MAHOUT_HEAPSIZE=24000, mapred.map.child.java.opts=-Xmx24g just to see if I could get Mahout to acknowledge the increase in heap space, but this does not seem to be helping at all. What else can I try to get past this problem? The system has plenty of RAM. Thanks, Ryan ./bin/mahout trainclassifier -i /user/ryan/pageclass-train -o pageclass-out -type cbayes -ng 1 -source .... 12/05/04 15:52:43 INFO cbayes.CBayesDriver: Calculating Tf-Idf... 12/05/04 15:52:46 INFO common.BayesTfIdfDriver: Counts of documents in Each Label Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.lang.StringCoding$StringEncoder.encode(StringCoding.java:232) at java.lang.StringCoding.encode(StringCoding.java:272) at java.lang.String.getBytes(String.java:946) at org.apache.hadoop.io.DefaultStringifier.fromString(DefaultStringifier.java:73) at org.apache.mahout.classifier.bayes.mapreduce.common.BayesTfIdfDriver.runJob(BayesTfIdfDriver.java:88) at org.apache.mahout.classifier.bayes.mapreduce.cbayes.CBayesDriver.runJob(CBayesDriver.java:51) at org.apache.mahout.classifier.bayes.TrainClassifier.trainCNaiveBayes(TrainClassifier.java:58) at org.apache.mahout.classifier.bayes.TrainClassifier.main(TrainClassifier.java:151) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68) at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:188) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.RunJar.main(RunJar.java:156) -- RRR -- RRR
